The performance enabled Miyazato to finish at 12-under 276, four shots better than a pair of competitors, and claim her eighth career LPGA Tour title.
She entered the day with a three-stroke lead, lost it, but then regained her composure by birdying three of the last six holes to corral her first win since last year's Evian Masters.
Meena Lee (70) and Azahara Munoz (71) was close until the end, but finished by sharing second place at minus-8 at Ko Olina Golf Club.
Boston schools pull out free condoms over wrapping complaints
NBC reportedly holds celebs hostage to Jimmy Fallon's show